Matching Pairs Types of Barriers VocabularyOnline version Click on the box to match the correct term and definition. by Stephanie Muniz 1 levee 2 dam 3 sea wall 4 sand dune 5 sand bags a bank built along a river to prevent flooding a wall built to protect land along the coast from erosion and flooding from the sea bags filled with sand a hill of sand near an ocean or in a desert that is formed by the wind a barrier that blocks flowing water or sends it in a new direction.